Speaker Choices For My System

This will be the first of about a million suggestion you are going to get.  

You initial list is very good but very different sounding speakers.  I would encourage you buy on 30 day or 60 day return policy if you can't return.  

I personally like the Spendor 9.2s A LOT with your amplification.  I think these would be brilliant as a floorstander as they are neutral yet deliver a big soundstage.  For a floorstander, these would be my first choice.

I happen to like Spendor better than Vandersteen but that would be my second choice of this list.  I am not sure I like B&W or Focal with that amplifications unless you like a very forward sound profile.  

The Joseph Audios are wonderful.  They aren't my favorite stand-mount in this price range but .  I would be much more enthusiastic about the Raidho XT-1s with a subwoofer as they will deliver a much bigger soundstage.  I would also look at my brand of speakers, the Verdant Audio Nightshade 1s.  Huge soundstage and very musical.  

Your choices in generally are well suited for your room. 

Full disclosure.  I have access to a variety of brands but am a dealer for Raidho and obviously the speakers I manufacturer.  I can also get Sendor as an authorized dealer.  

Well, most know me as a Vandersteen fan here, but your list is a pretty good one. As I have said before, you really have to listen to a speaker to know if it floats your boat.
At $10K, should you buy used will give you a greater field to choose from.
In fact, instead of the Vandy Treo's, I would go with the Quatro's- then you would get the equalized bass.
And, if you like Vandersteen, then please consider planar speakers like Magnepan or Sound Labs.
Sorry to add fat to the fire, but there sooo many speakers that will make your hair stand on end.
If there is anyway to make a trek to a dealer to audition before you buy, then I would be the first to advise you to do so.
This listening process is, to me, fundamental to getting equipment that 'speaks to you'.
Bob

OP -- I love your list. From that list, I'd be most curious about the Spendors, because I've heard speakers in that line and like them. Have heard good things about the Joseph. I've been turned off by the B&W line, but have not heard the better ones.

I second the suggestion you try some Maggies.

You might also really be taken by Salks, Silverline, Focal, Revel, or Legacy stuff.

In my opinion, there is no substitute for listening in your own space, so if I were you, I'd consider places to audition them, and also check out what Crutchfield sells. I tried giant towers from them; 60 day trial; $20 to ship them back (they were Martin Logan ML 60s). I know there are higher end places to buy/try from, the Crutchfield's home trial policy is impossibly good.

Consider: 

https://www.crutchfield.com/g_12000/Floor-standing-Speakers.html?tp=185&o=d

https://www.crutchfield.com/g_37900/Bookshelf-Speakers.html?tp=186

Thanks.

Crutchfield does sell the Wharfedale Elysian 4, which also is of interest to me.

And believe me, I know there is no substitute for auditioning, especially in one's own room, but I will not be able to do that for this purchase.

Appreciate the responses from everyone thus far!